Biaxin Side Effects: Sleeplessness. Strange dreams. Dizziness. Ears feel strange, c http://www.medications.com/effect/view/8268 Sleeplessness. Strange dreams. Dizziness. Ears feel strange, can't quite explain it. My moods have also been strange, very easily angered. I am being treated for sinuitis. I am taking 500 mg twice per day. I am also being treated for a sinus infection. I have been on the Mon, 10 Dec 2007 10:34:14 -0500 http://www.medications.com/effect/view/8268?item=3358 I am also being treated for a sinus infection. I have been on the Biaxin for one week today and still have pills to take. It's 500mg twice a day and I am so dizzy!!! I can't concentrate and my dreams are nightmares!!! I think I'm going to call the doc toda http://www.medications.com/effect/view/8268?item=3358